Patina is the natural discoloration that occurs when metal reacts with the atmosphere.
Patina is the natural discoloration that occurs when metal reacts with the atmosphere. Learn why an authentic patina is so much appreciated by coin collectors.
A piedfort is a heavier version of a coin, originally intended as a trial or gift. Discover the origin, significance and rarity of piedforts.
Many people think that cleaning old coins brings back shine. Nevertheless, this is one of the biggest mistakes collectors can make. Polishing or cleaning coins affects the metal and can completely destroy the collector's value.
Discover everything about the Silver Rider dukaton: origin, design, provinces, weight, silver content and historical significance. Complete knowledge article by Schulman.
